Sewing-machine



C. E. MYERS.

SEWING MACHINE.

APPucATmN FILED 1AN.`18.1916.

Patented Sept. 2, 1919.

3 SHEETS-SHEETI C. E. MYERS. SEWING MACHINE.

APPLICATION FILED IAN. I8. |916.

. Patented Sept. 2, 1919.

3 SHEETS-SHEET 2. v

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vIIII I| l I' In I lI I Q "3 N "I fle; 4

C. E. MYERS.

SEWING MAcmNE.

APPLICATION ILED JAN. I8. 1916- V Patented Sept. 2, 1919.

3 SHEETS-SHEET 3.

Gtkmaq UNITED sTATEs PATENT oEEIcE.

CARLIND E. MYERS, F CAMDEN, NEW JERSEY.

SEWING-MACHIN E.

To aZZ whom z't may concern.'

Be it known that I, CARLIND E. MYERS, a citizen of the United States, and res1dent of Camden, county of Camden, and State of New Jersey, have invented an Improvement i in Sewing-Machines, of which the following eliminating, as far as possible, reciprocating jointed parts and substituting means involving rotary action for the purpose of eliminating lost motion, objectionable wear and looseness, back-lashing. and imperfect lubrication. My object is also to eliminate as far as possible causes of objectionable noise with the object of producing a sewing machine which may be run at `enormous speeds and with comparatively noiseless action.

By my improvements applied to sewing machines, I am enabled to run the machines in commercial usage at a speed of upward of 3000 revolutions per minute with materially less wear and tear and less noise than the, ordinary commercial machines when running at approximately one-half the speed. Vith the above and other objects in view, the nature of whichwill be more fully understood `from the description hereinafter, the invention consists in the novel construction of sewing machine as hereinafter more fully described and defined in the claims.

Referring to the drawings z-Figure l is a side elevation of a sewing machine embodying my improvements with a portion broken away and certain parts removed to more fully disclose the construction; Fig. 2 is a view looking upward upon the bottom of the machine; Fig. 3 is a cross section through the bed of the machine and operative parts on line m-.r of Fig. 2; Fig. 4. is a similar view on line v/-fr/ of Fig. 2; Fig. 5 is a` cross sectional. view on line .e-z of Fig. l; Fig. 6 is a sectional view of the crank head for operating the needle bar; Fig. 7 is a perspective view of one of the bearings removed; Fig. 8 isa sectional ele- Speccation of Letters Patent.

Patented Septt, 1919.

Application filed January 18, 1916. Serial No. 72,657.

vationrillustrating the cloth feed mechanism; Fig. 9 is a detail with part broken away for operating the cloth feed mechanism; Fig. 10 is a plan view with part of the casing in section showing the manner of operating the cam which oscillates thc needle; Fig. 1l shows a modification of the manner of driving the two main shafts of the sewing machine; and Fig. 12 is a section of a detail of the bar` which operates the needle holder.

2 is the bed and 3 the over-hanging arm of the sewing machine which may be made of the usual general construction common to sewing machines. Arranged in the overhanging arm and in suitable bearings therein as customary, is a straight horizontal driving shaft #l which may be driven by a band from the usual band wheel. At the over-hanging end oit the arm, the needle bar 7 is arranged and adapted to reciprocate vertically as is customary, and this is reciprocated by means of a crank pin G on a crank head 5 securedto the end of the shaft il. The crank pin 6 o'f the crank head may connect with the needle bar 7 by the usual pitman or link, the particular manner of applying the power to the needle bar being immaterial. The crank head 5 is best shown in Fig. 6 from which it will be seen that the end opposite to the crank pin is provided with gear teeth 5a, and the metal immediately back of the crank pin and between it and the gear portion is cnt away as at F" so that the heavy metal at 5c on the opposite side of the body acts as a counter-weight to counterbalance the weight of the reciprocating needle bar and its connections when the machine is being run at a high speed. As the crank head `revolves at a speed as high as 3000 revolutions per minute, the centrifugal action of this connterweight portion 5c acts in an effective manner in overcoming the gravity action of the needle bar and its connections and steadies the operation of the mechanism, giving to it a very positive action.

26 is a rotary take-up and is secured upon a shaft 26L carried in a bearing in frame 27 secured to the top of the overhanging arm, and this shaft 26a is provided With ak gear 26b which meshes with the gear 5a of the crank head, as will be understood from Figs. 1 and 5. In this manner, the rotary action of shaft` 4 and crank head produces a rotary action to the take-up device, and as this is devoid of reciprocating parts it ismanifest that the speed may be runat 3000 revolu tions per minute without injury to tl1"e'struc ture. I do not restrict myself to anynspecial form of .a take-up device, as any rotary Y take-up.v suitable for a sewing machine Vmay be employed solong as it is driveni'n4 the Vmanner herein shownand described.

The needle bar 7 is providedwith an oscillating needle'holder 16 pivoted tothe v'needle bar at 16a,rand saidfholder is-providedwith an upwardly extendingrodor Varm 16 by F which it may be oscillated. By oscillating `the needle holder, Vthe needle may beinade to vibrate atits Vpointed`end,=while' fat the saine time` having the vertical reciprocatory motion through 'the needle bar, 'such asV is required 'for zigfzag or over-seaming stitching,all'of vwhich 'is well known and does'not constitute .y any special feature ofr niy inven-V tion. Heretofore, it has been Customary to Voscillate the needle holder byjrneans of cer-l f cam for operating-theineedle holder, and is Y tain hingedmechanism whichhad a tendency. Lunder reasonable speeds tov-,wear and become loose and unreliable, andi to overcome thesefde'fects I haveemployed the par'- ticular'mechanism. illustrated and to which referencewillnow bema'de.- 21 -is the usual l'drivenfby meansof a bevel gearingjQZ (Fig.

1 10)by which the cam 21 receives rtaryfmo- Wheei'ei escalates a pivod @mea ii-bar Vl7'connects at one end withthearin 16? of tion -directly from the shaft 4. The cam the needle holder, and at the other end with i lju's'tab'le uponthe arm 23 to vary thefthrow.

At the opposite end offthe bar '17 thereis pivoted 'at "19a a hub portion 19 havingv a vertical hole through which the'rodorarm 16 of the needleholder loosely extends, 'and Y by'V which 'it maybe oscillated 'byvthe recipyrocations of the bar 17. YThe baradjacent to this end is `provided 'with a guide slot 18 in Y which is' arranged a kguide block `1Sa ip'ivoted at 1'8b'toa casting vQO'bolte'd to :theside' of the over-hanging arm 3. Inthisi'n'annenfthe bar 17 ymay be guidedwhile being :reciprocated, the said guidejblookbeingoapable of oscillatory motioii'to accommodate itself 'dto any oscillationV of the blarthereonduetothe action of the pivoted varm 23. The bar 17 more-positively This adjustable arrangement of thelbarfisbest shown in Figs. tland -cam'groove o-fV cam wheel21, one endof Ysaid v spring being connected with the -b-ar 17Vand' insured, and any lost .motion due to wear is overcome since the arm 28 isinade'to constantly bear against one continuous surface motion.

f VLei/1,8m

,I Any other suitable manner of adjusting thelength Vof the bar 17 may be employed.

in lieus of thats'l'i'own.V V'Provision for this adustnient is desirable because when the bar 17 isadjusted up or down upon the arm 23 to vary the throw, it'swings about the'axis 18b vand would tendto thro-w the, needle point out of position, and -to avoidthis some means of Vready adjustment 'should beeinployed.

The mea-ns shownis only by wayof example, however, and may be varied. Aspring 25 is 'employed to maintain the free end'of the arm 23 in' contact with fthe inner walll of vthe the other end with the frame of thel overhanging arm 3. By employment "of thisV spring Q5, moreaccurate action of the cam-is or wallo-f the cam groove. Y Y

It will `be 'understood from the foregoing l description that as 'the' shaft 4 rotates, the cam wheel 21 is likewise rotated in a continuous mannenbu-t by reason of the bevel-gear- Ning-22 being of the constructionY shown'inj.

Fig. 10,'the speed ofthe-cam wheel 21 is'onehalf thatof/the shaft 4l and `the'cam is such that fthe needle is oscillated into its extreme positions alternately with the vertical recipf yrocations ofthe needle bar. As the arm1213 is oscillatedby the cam, the bar 17 is reciprocated upon the block 18a,1and by this action 'andtliroughthe pivoted-hub 19, itosc'illates 100 'the needle holder 16. The guide block 18EL is relatively large and forms` an excellent guide 'forthefree end of the bar'17 which willpenk mit a very high 'speed `without undue wear.- Ffurthermord'the inovin'gjmassat theend of Y thefbarV is reduced to alminimum andthere- ',forethe inertia vtobeovercome in thereoip# Y f f 'roc'ationjs'fis likewise reduced'an-d permits a rapid speed with minimum Vvwear and lost Y Y y ilo 'Att'hebottoin of the machine the cloth feed mechanism, as well as theshuttle Vmechanism, 'are suitably driven byk a continually rotatingshaft 8 journ'aled in the frame of the machine in any suitable manner. This 115 shaft 8`siniila'rly`to-the'shaft 4 is a continuous straight shaft and henceinay berotated Y at a very high speed without` introducing difficulties by centrifugal action, as "occurs in those types ofmachines'where cranks are 120 employed in the upper and lower shafts for the transmission of ino-tion by .means Vof links. Motion is transmitted from the upper sliaft'4 to the lower or driven shaft '8 by suitablev power transmitting devices whichl travel 125 i in a continuous' directionandare devoid of reciprocating f motion, V,and 'the preferred Y mechanism 'for rvthis purpose is more fully illustrated in Figs. 1, 2`and 7. 9 is a vertical shaft extending almost for the full.A distance 1 30 between the shafts 4 and 8, and is arranged *in the vertical portion of the over-hanging larm 3. The upper end of the shaft 9 is connected with the driving shaft 4 by miter gears 10, and the lower end of the said shaft 9 is connected with the driven shaft 8 by `means of miter gears 11. It will be observed that these miter gears 10 and 11 are so arthe driven shaft 8 in the same direction as the driving shaft 4, but while this is essenp tial in the particular mechanism shown in the present application, it is manifest that the shaft 8 might be rotated in the reverse direction to Fig. 4 if the shuttle and feeding mechanisms were suitably designed to permit such reversal movement, and I therefore do not'restrict myself to the rotation of the shafts 4 and 8 to be in the same direction. Furthermore, I do not restrict myself to the gears 10 and 11 being miter gears,

' as it is manifest that they might be bevel gears of suitable dimensions so long as the `speeds of the 'shafts 4 and 8 are the same, Ias the particular speed of shaft 9 is not material. The shaft 9 is journaled in a suitable casting 12 having top and bottom bearing portions 13. This casting 12 is provided with laterally extending hubs 13 which project through the side of the vertical portion of the over-hanging arm and are screwed tightly to plates 14- by means of screws 15. These plates 14 are set into planed recesses 3*l in the side of the overhanging arm portion, and are secured therein by screws 14a. In this manner the bearing casting 12 may be arranged within the -hollow chamber of the over-hanging arm,

and may be accurately adjusted as to position by means of the particular attachment shown, and moreover may `be readily removed for repairs when necessary.

2.8 is the feed bar and is provided with the usual serrated feed jaw or plate 28a. This bar 28 is further provided with the slotted end 28h, in which a slide block 28 `fits andA forms a connection between the crank arm 33 and 'the feed bar. The crankarm 33a extends from a rock shaft 33 pivoted at 34 and adapted by its oscillation to raise and lower the yfeed jaw to and from the presser foot above. The rock shaft 33 is rocked by means of a suitable cam 36 and a crank arm 35 adjustably clamped upon the 'rock shaft. The cam 36 is secured to a shaft 37 carried in a bearing 37 and is rovided at its opposite end with a cam w eel 38 which is driven by a pinion 39 secured to the driven shaft 8, before referred to:

In `this manner, a continuous rotary motion is imparted to the cam wheels 38 and 3,6, and a rocking motion is imparted to the rock shaft 33. The feed bar 28 is pivoted at its end most distant from the rock shaft 33 to a crank arm 31 by means of a transverse )in 31", said crank arm bein adjustably clamped near the end of a tubu ar rock shaft 29, the clamping construction consisting of slotting the hub as at 32 and providing the clamping screw 32t0 draw the slotted parts together tightly upon the shaft, all of which construction will be better understood by reference to Figs. 2,- 8 and 9. Furthermore, the crank arm 31 is provided with two radial arm portions 31 between the free ends of which the feed bar is arranged and hinged] y held by the transverse pm 31" extending through the two arms and the bar, as will be fully understood by reference to Fig. 9. By this means, the oscillations of the crank arm provide a direct thrust upon the feed bar, and notwithstanding the very high speed at which the machine is driven, there is a minimum of wear and lost motion. rFhis construction of applying the power between the rock shaft 29 and the feed bar is strong and effective against undue wear, and moreover, the crank is capable of adjustment upon the rock shaft to accurately position the feed jaw. The rock shaft 29 is made tubular and of considerable length, and the ends of the tube are fitted with plugs 29 brazed 0r otherwise secured therein to form bearings for the pivot pins 30 at each end. This rock shaft is rocked by lneans of a link 42 and a second crank arm 43 which may be adjustably clamped at 44 upon the rock shaft so that it may also be adjusted circumferentially about said rock shaft when adjusting the machine. Both of the crank arms 31 and-43 are arranged relatively close together and 'near one end of the lon rock shaft 29, so as to be near one end of t e end bearings and permit a reasonably direct application of power from thc operating link 42 to the `feed bar 28 and prevent springing of the rock shaft under igh speed. Moreover, by making this rock shaft hollow, the inertia of the large mass which would be present if it were made of solid steel, is overcome and the rocking motion of the shaft may be made at 3000 revolutionsper minute without excessive loss of power and wear upon the moving parts of the machine. While eliminating the mass in the rock shaft, it is also desirable that the two crank arms 31 and 43 should be arranged close together and near one end of the end bearings to prevent the sprin ing of the hollow shaft, heretofore referrer to, especially as it is desirable to make the diameter of the shaft as small as possible consistent with sufficient strength and minimum weight. The link 42 which is pivoted to the crank arm 43 at one end has its other end pivoted to a slide block 41a adjustably clamped upon an operative arm 41 secured to arock shaft 40. The oscillationof the Y Y .,YzTrliershilttlefmechanismfmay'beiof any of 1 ftheinsualfformsiandLdesirably Qf the rotary arm lfby-the rockingioffthegsliaftgQ Awill produce va:I.recipsrocationy of the linkyand .y inth-atgniannerrock the 4melt shaft-29. By

fferredgto; {11t- Will thus vloe-seen that asthe lsaid action beging2 at one-ilial'f. the A,Speed of Y the shaft 8 iandgthereforezat ionehalf the Vneedle bar; Asa,thetwo.canrwheels SS'and jare ton the ,saine yshaft 37, it is .manifest Vthat the horizontal reciprocations.` ofthe ,feed

bar-28 and its vertical reciprocationaare-in Y,

:theeanie ft-iine tonniaintain the properconi q feed vbar .128; in ,an :oblique direction to A`the* y two znioyementsjof fsaid;%bar,Whereby:;the M3 5l zfbar iskA fpulled; Vhorizontally, and ,yertically funder i' the action ojfithe springfand 1n this manner maintainsfthe.-operatVe mellnsm Y :always lunder definite f tension to Veornpensate `foraany:slight dost 1110131011 1n therr'eciprocatlngrparts.

Y "Y type'.` Ehe `shnttle me'chaniem is i driven by fthe f-gearsx `ifrom a shaft A52which latter Vyates athe needle VAbar, this, however, being' commen to4 lsewing lmachines:.of theWheeler 1 1Wi1son7? type, and does Ynot fi'orm ian, fesx5'5 sential part'ofamyiniprovements.

,KAs alternate modeefftrarnsmitting; con- ,l :tinuous if-rotary "motlon fir-om gthe driving y.

Y ash-aft 14C" to thefd'riveneshaft 8w\1`1ich;1knay nsefdfin place:ottheyertical Ashaft and vVv miter; gears, I-ihaveushowir inf-Fig. pill ga; conf'struction employingsprocketfwyleelson; the i shafts :connected "Joy a i'elriving fohain. 1 Ref Pferring `to Fig i 11, r102?? is la sprocket Wheel secu-red tothe shaft 4,andzllais asprocket .1.65 Wheel a'of zsimilar,fidialneter `secured to the eciLiusbing tllesldelauron shear-111,41, die

:speedi ofthe: ,lsliaft which reciproca-tes AAthe y tlc-ation .in Serieus @-paltieilhars witheutlde- Y annata: f

,Shaft 8- Libert-these ,ser 1hab-Wheels i5 an j ,@Iwlleeirsv Chain *92H l ln tls` e .eener beth Off i .the shafts; .are rotated iin thefs'anie direction and. atftlwsame rates@0fremedy-mid* hle l ,ith'srmay be Subeituted 'Orche @the ,man-1 flier @transmitting menen/:between Vthese @hafta nevertheless L-prefen.fWherel-pess ible, 'te-employ the; verbi,@a1,'Shaft` 9., andthe. Y imiterifgear 10am-,llt as; herelfllb'eerelde- Y jsrledlt `will fheJarra-lelitgtbatl pbafyeffdef .viSed"anovelandiieeulge" [hiCh eine@ @1 -ies i fthe [features of avantage 'enumerated aS-deSrablemnd 11i detail@ asti-the Same fareelisepibl ,0i nwd- 1P attire; rom fthe 'Spirit Cal-Seepejpf;allein:

:,Vention. Y 1

.the 1 meehaiiem lfor reminding I :the i driving arm zwitlrpthe vldrive elgafofor r Shuttle Y eed fmechanm invetheib ,v

. l mechanism-iol .verticallyreciprocating flle ,needle-.or for laterally Vibrating theneed1e,95 1 as these;l fea-tures gyyillaferm 'subject matter of Separate .Lappl-i@atie-11s.` Y' Y f Y, 'Hayngfnew'Ideseribdfmy nrentlenfwhat vl claim:` aegnew anddesire tofseeurefby Let-VV i ters jlatent, is? I J l. ln; a, tsewiegmhn,

fwherebyftheithrust QnftheiharsfXertedf in the' planefefgthe,adjusted Goimeetion between @the Vhollow rock shaft-@11d e meanstoroekingthe hollow rock i shaft.

2. In vva-swing Ym.,a.frhirle the; combination fclothlfeed and -itsslfeedibars-whollew' Y H i-frck shaft pvotedlv atvitS-f endsta crank .farm

:clamped to the frockhaftaand'f providing i115 twoiradialf arms between which theefeed; ,bar Efisg-piyotedjwhereby the thrustis yexerted. in

the planeofthe;Connection;betweenithrock v t Shaft andcrank; ar1n,;and means Ifor#rocking lathe hollow-',shan-fsaidf Tmeans comprising aj-120 crank adjuetablyaclampdfaupeilthefhellow roclnslgaft; andelatiyely close-to thecrank'` ;a1m;W1iich operatesfthe feedfbanfcam means, fand a f-linkyconnectionz'between i ;he lcam `:inea-ns and-theiadjnstable crank; Y i i 125 i a; sewing machine; the? ycombination not a feedaandvgfeied ;fbar, va;l0tary; shaftpfor :operating thefshuttleior loop mechanism, a :Eflzong i rock- ;fsha'ft 1 journaled ,ataitsgjends i and Y vhaving an oscillatingfarm; nearQone endfcon- .i l 3 0 vstood athat I do jnotkgreetrict, anyselffltq the ,i i Y 31117.this ,applicationfnoQelaigngie',niadeto i: v y f Y 5.shaft for kth@` needle' bemin the e'Y Y mi adjustment and providing twoi radial' e Y c .farmabetweemwhch the zfeedibar Sr-ehinged c crank; arm,-fand i necting means between the oscillating arm and the feed bar, whereby the latter is re-` ciprocated, a short rock shaft having a crank arm, adjustable. connections between the crank arm and the long rock shaft close to its oscillating armi, whereby the angular rocking of the long rock shaft may be varied, a short cam shaft geared' to the rotary shaft to revolve at a lower rate of speed and provided at each end with cam mechanism, connecting means between one of the cam mechanisms and the short rock shaft for rocking it, and means operated by the other cam mechanism for raising and lowering the feed bar, all of said mechanism being located below the bed plate of the machine and in close compact relation to reduce the lengths of the connecting and coperating parts.

4. In a sewing machine, the combination of the feed and feed bar with a long hollow rock shaft widely pivoted at its ends, two crank arms each adjustably clamped about the hollow rock shaft relatively close to one end thereof, one of said crank arms being hinged to the feed bar, and power devices for rocking the other of the crank arms for rocking the. rock shaft.

5. In a sewing machine, the combination of the feed and feed bar with a long hollow rock shaft widely pivoted at its ends, two crank arms each adjustably clamped about the hollow rock shaft relatively close to one end thereof, one 0f said crank arms being hinged to the feed bar, and power devices for rocking the other of the crank arms for rocking the rock shaft consisting of a shaft arranged parallel to the rock shaft, an arm secured to the end of the shaft adjacent to the feed bar, a link between the arm and the crank on the hollow rock shaft, a crank arm secured to the other end of the shaft carrying the arm, a cam to operate the last mentioned crank a driven shaft, and gearing between the drlven shaft and the cam, the construction being such that the link connection for rocking the rock shaft shall be located relatively close to the feed bar.

6. In a sewing machine, the combination of a bed, a feed and feed bar, and means for directly operating the feed bar arranged below the bed and comprising the following parts, namely, a short rock shaft arranged at one end of the feed bar and hinged thereto for reciprocating it vertically, a rotating cam arranged close to the feed bar, an adjustable arm clamped to the short rock shaft and enga-ging the cam, a rotating power shaft arranged below the bed, gearing between the power shaft and the rotating cam., a long rock shaft arranged below the bed at the opposite end of the feed bar, an adjustable arm clamped to the long rock shaft near one end, and to which arm the feed har is hinged to impart horizontal motion to the feed, a crank arm adjustably clamped upon the long rock shaft close to the arm which operates the feed bar, a short rock shaft arranged under the bed and relatively close to the feed and provided with an adjustable crank, a link between the adjustable crank and the crank arm of the long rock shaft, and cam devices for operating the last mentioned rock shaft having the adjustable crank, said last mentioned cam devices secured to and rotating with the first mentioned cam devices, whereby all of the means for imparting horizontal and vertical motion to the feed bar are arranged close to it and below the bed of the sewing machine.

7. In a sewing machine, the combination of a bed, a feed and feed bar, a long rock shaftv at one end of the feed bar, a short rock shaft at the other end of the feed bar, connections between the short rock shaft and the feed bar for imparting vertical motion to the bar, connections between the long rock shaft and the bar for imparting horizontal reciprocating motion thereto, a power shaft below the bed, a short cam shaft also below the bed and having a cam at each end, gearing between the power shaft and the cam shaft for driving it at a lower rate of speed than the power shaft, means actuated by one of the cams for rocking the long rock shaft, said means being relatively close to the feed bar, and means operated by the other of the cams for rocking the short rock shaft, all of the devices for operating the feed and feed bar being arranged adjacent thereto and located under the bed of the machine.

In testimony of which invention I here-i unto set my hand.

CARLIND E. MYERS. Witnesses:

R. M. HUNTER, FLORENCE DEACON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). C. 

